Jacob l



(No Model.)

J. L. WORTMAN.

BOOK FOR STYLOGRAPHIU MANIFOLDING.

No. 434,370. Patented Aug.12,1890.'

UNITED STATES ATENT 'FFICE.

. JACOB L. WVORTMAN, OF \VASHINGTON, DISTRICT OF COLUMBIA.

BOOK FOR STYLOGRAPHlC MANIFOLDING.

SPECIFICATION forming part of Letters Patent No. 434,370, dated August 12, 1890.

Application filed March 3, 1890. Serial No. 342,379. (No model.)

To all whom it may concern.-

Be it known that I, JACOB L. WORTMAN, a citizen of the United States, residing at Washington, in the District of Columbia, have invented a new and useful Book for Stylographic Manifolding; and I hereby declare the following to be a full, clear, and exact description thereof.

The drawing represents a perspective view of a book made in accordance with my invention.

My invention relates to an improvement in books of the character employed for producing at the same moment a Written letter or other document and a counterpart thereof on a separate sheet, the first or so-called original being afterward removed from the book, while the duplicate or so-called copy remains bound in the book, or vice versa- Books of this nature present two essential characteristics, the first of which is that the operation of making the copy is simultaneous with that of making the original, and the second is that the copy or original thus made is preserved in a permanently-bound condition, like the copies in the ordinary letter-press copy-book.

The features above named have long been recognized as highly desirable, and various ways have been suggested for their attainment. Among these may be mentioned the use of an interposed sheet of ordinary carbon manifolding paper, the face of which is presented to the under sheet, (intended as the original.) while the operation of writing is performed with a graphite pencil upon the upper sheet, (intended as the copy.) Another construction involves the use of exceedinglythin paper for the copy, and has interposed between this copy-sheet and the sheet intended to receive the original a sheet of carbon manifolding paper having the carbon on both sides. The writing in this is performed on the copy-sheet, as before, but with a stylus, a pencil being unnecessary. The objection to both of these constructions is that the original letter is necessarily written with an easily-eradicated substance, while the copy, being in the first case written on the upper side of the sheet with a lead-pencil and in the second case on the reverse side of the sheet with easily-removed carbon, fails to present that permanency which is essential to the successful employment of the book in cases where its use as a record is contemplated. A

further objection to the second form, in which double-faced carbon-paper is employed with the stylus, is that the legibility of the copy depends upon the degree of translucency of the paper, and this translucency decreases with the thickness and hence with thestrength of the paper.

The object of my invention is to produce a book in which stylographic manifolding of the class described may be performed, bythe use of which a permanent ineradicable record may be made in the form of an exact counterpart of the original at the same operation by which the original is produced. In

other words, the object of my invention is a or other suitable material bound together,

preferably having each alternate sheet or one sheet in every three or four, or in less proportion, perforated near its inner edge for easy removal, and preferably having such removable sheet of greater thickness and strength than the others, to render it more suitable for use as a letter-sheet, the book being further provided with a sheet of double-faced manifolding-paper carrying a coloring substance and a permeant vehicle therefor interposed between alternate leaves and capable of being removed or shifted from between one pair of leaves to another pair. The manifoldingpaper which I employ differs essentially from the so-called carbon-paper, and is in a measure an improvement upon the product patented to me January 24, 1888, No. 37 6,7 64. As in that patent, the salient characteristic of the manifolding-paper is that it carries the coloring material with a non-drying oil or equivalent permeant vehicle for the color, whereby a quantity of color is conveyed into and permeates the fiber of the sheet 011 press-' ure applied to the reverse side of the manifolding-sheet; but whereas the specific product set forth in that patent, being intended for use in typ e-writing and similar operations, was necessarily and especially made so that the color while on one side of the manifolding-sheet would be kept from transferring from the other side the product which I employ in combination with the other elements forming my present invention is especially made with aview to giving from both surfaces of the sheet a transfer in equal quantity of the coloring material and its introduction into the fiber of both the upper and lower transfersheets by the permeating operation of the non-drying oil or other vehicle; hence in the present specification and claims the product now employed may be designated as a sheet of paper having on both surfaces a color, together with a non-drying oilsuch as refined cottonseed oilthe paper being coated and prepared in a peculiar manner, so as to present a surface of a tinctorial character, yet requiring a slight pressure to cause the transfor of the color to another surface. Such pressure, however, causes the non-drying oil to be transferred to the contiguous transfersheet, entering or permeating the fiber thereof and carrying with it a portion of the color in exact representation of the impact or impressio n by which the transfer was caused. The oil thus acts as a permeant vehicle for the color.

The use of a book of the kind described, having a manifolding-sheet of this description employed in the manner above set forth, preferably with a stylus as the medium of writing, produces as the original a writing made to all intents and purposes with a permeating ink and a copy in which the same character of permeating ink enters the fiber of the copy-paper on the reverse side and appears at' the upper surface. The copy-paper is ordinarily of a more bibulous character, as well as thinner, than that for the original; but this is not essential to the use of the book, although the less thin and bibulous the copypaper is the less distinct is the copy, owing to the impediment to complete permeation.

As the permeability of the tinctorial substance is entirely independent of the condition of the copypaper, except as described above, it is obvious that either soluble or in soluble colors, or both, may be employed; but I prefer and generally use the insoluble colors, which will not fade when subjected even to the most unfavorable conditions, such as long exposure to sunlight; hence the copy produced possesses not merely the qualities found in the letter-press (wet process) copy, but a durability equal to that of original manuscript written with insoluble ink.

I do not herein claim a manifolding-sheet which carries on both surfaces a coloring substance and a permeant vehicle for the color; neither do I desire herein broadly to claim the specific improvement in the product patented to me January 24, 1888, distinguished as the book made up of alternate leaves of writing and copying paper, unless the same is adapted in the manner and with the additional features described to the production simultaneously of a tinctorial original and copy both of a substantially-permanent character; but

What I claim, and desire to secure by Let ters Patent, is

1. A book for stylographic manifolding, comprising leaves of paper or the like, and having interposed between alternate leaves a removable sheet having on both surfaces a coloring substance, together with a permeant vehicle for the color, substantially as described.

2. A book for stylographic manifolding, comprising leaves of alternate writing and copying paper, the writing-paper being provided with perforations for easy removal, and a removable sheet having on both surfaces a coloring substance and a permeant vehicle for the color, substantially as described.

JACOB L. XVORTMAN.

\Vitnesse.

DOUGLAS DYRENFORTI-I, BRUoE S. ELLIOTT. 

